sampleN.TOST
Character string describing the study design.
See known.designs() for designs covered in this package.

sampleN.scABEL and sampleN.RSABE
Design of the study to be planned.
2x3x3 is the partial replicate design (TRR|RTR|RRT).
2x2x3 is the 3-period replicate design (TRT|RTR).
2x2x4 is the full replicate design with 2 sequences and 4 periods.
Defaults to design="2x3x3"

Get others from known.designs(). The column design shows the argument to specify in the functions (e.g., design="2x2x2" or design="parallel").

—All the best,
Helmut Schütz

The quality of responses received is directly proportional to the quality of the question asked. ☼Science Quotes

RTFM‼

Are you a troll? You estimate the sample sample for the PK metrics of interest (see this post) and the values Detlew stated already above. Only you know which design you will use! Plug the argument in one of PowerTOST’s functions. What’s your problem‽

—All the best,
Helmut Schütz

The quality of responses received is directly proportional to the quality of the question asked. ☼Science Quotes

RTFM‼

how shall I know in which design you plan to perform the steady state study?

» What word must be written instead of "parallel" for calculate sample for steady state study?

Heck, a steady state study can be done in any of the designs given by known.designs()!
If it’s not a parallel but a simple crossover use design="2x2x2". If it’s a four-period full replicate use design="2x2x4", et cetera, ad libitum, ad nauseam.

—All the best,
Helmut Schütz

The quality of responses received is directly proportional to the quality of the question asked. ☼Science Quotes

The rise of biometry in this 20th century,like that of geometry in the 3rd century before Christ,seems to mark out one of the great ages or critical periodsin the advance of the human understanding. R.A. Fisher